Device for roller-flanging cylindrical bodies

Abstract

An roller-flanging device for flanging at least an end region of a cylindrical body includes a receptacle having a longitudinal axis common with the cylindrical body being flanged. Flange rollers are rotatably seated in the receptacle about the common longitudinal axis, and roll along a surface of the cylindrical body. The flange rollers each have a part with a cylindrical surface and a flange collar for forming a flange contour on the cylindrical body. At least one limiting body is disposed between contiguous ones of the flange rollers, and extends inwardly toward the common longitudinal axis beyond the circumscribed cylindrical surface of the cylindrical parts of the flange rollers at least when forming the flange. The at least one limiting body prevents burrs or material from the cylindrical body from reaching or extending beyond the cylindrical surface of the flange rollers, and assures a uniform flange diameter.

What is claimed is: 
     
       1. An apparatus for roller-flanging at least one end region of a cylindrical body, the apparatus comprising: a receptacle having a longitudinal axis common with the cylindrical body being flanged;   a plurality of flange rollers, rotatably seated in the receptacle about the common longitudinal axis, which roll along a surface of the cylindrical body, the flange rollers each having a part with a cylindrical surface and a flange collar for forming a flange contour on the cylindrical body; and   at least one limiting body, disposed between contiguous ones of the plurality of flange rollers, the at least one limiting body extending inwardly toward the common longitudinal axis beyond the circumscribed cylindrical surface of the cylindrical parts of the flange rollers at least when forming the flange;   whereby the at least one limiting body prevents burrs or material from the cylindrical body reaching or from extending beyond the cylindrical surface of the flange rollers, and assures a uniform flange diameter.   
     
     
       2. An apparatus as defined in claim 1, wherein the at least one limiting body rotates. 
     
     
       3. An apparatus as defined in claim 1, wherein the at least one limiting body is cylindrical. 
     
     
       4. An apparatus as defined in claim 1, wherein at least one limiting body is provided between all contiguous ones of the plurality of flange rollers. 
     
     
       5. An apparatus as defined in claim 1, wherein each limiting body is a rotatably seated roller. 
     
     
       6. An apparatus as defined in claim 5, wherein longitudinal axes of the limiting body rotatably seated rollers lie on a circle about the common longitudinal axis. 
     
     
       7. An apparatus as defined in claim 5, wherein the limiting body rotatably seated rollers are displaceable radially from the common longitudinal axis. 
     
     
       8. An apparatus as defined in claim 7, wherein the limiting body rotatably seated rollers are displaceable radially from the common longitudinal axis by one of: guide pieces, and   an eccentric seating arrangement.   
     
     
       9. An apparatus as defined in claim 5, wherein the limiting body rotatably seated rollers are driveable. 
     
     
       10. An apparatus as defined in claim 5, wherein the limiting body rotatably seated rollers are driven so that a relative velocity between a working surface of the limiting body rotatably seated rollers and an edge of the flange formed on the cylindrical body is zero, whereby damage to the cylindrical body and/or the rollers is prevented. 
     
     
       11. An apparatus as defined in claim 10, wherein the limiting body rotatably seated rollers are disposed so that working surfaces thereof are at right angles to an edge of the flange formed on the cylindrical body. 
     
     
       12. An apparatus as defined in claim 5, wherein the flange rollers and the limiting body rotatably seated rollers are seated in the receptacle, and wherein the receptacle rotates around the common longitudinal axis. 
     
     
       13. An apparatus as defined in claim 5, wherein the limiting body rotatably seated rollers and the flange rollers are each independently displaceable radially from the common longitudinal axis by respective ones of: guide pieces, or   eccentric seating arrangements.   
     
     
       14. An apparatus as defined in claim 1, wherein the flange rollers are displaceable radially from the common longitudinal axis. 
     
     
       15. An apparatus as defined in claim 14, wherein the flange rollers are displaceable radially from the common longitudinal axis by one of: guide pieces, or   an eccentric seating arrangement.   
     
     
       16. An apparatus as defined in claim 1, wherein the at least one limiting body effects a reshaping of the flange contour initially formed by the flange rollers. 
     
     
       17. A method of forming a flange in a cylindrical body which comprises utilizing the apparatus of claim 1. 
     
     
       18. A flange forming device comprising: receiving means for receiving a cylindrical body;   flange roller means, rotatably disposed on said receiving means, for forming a flange on the cylindrical body; and   limiting means, disposed on said receiving means, extending inwardly toward a common longitudinal axis of the device and the cylindrical body beyond a circumscribed cylindrical surface of the flange roller means, for limiting the extent of the flange on the cylindrical body in a radial direction and assuring a uniform flange diameter.   
     
     
       19. An apparatus for roller-flanging first and second end regions of a cylindrical body, the apparatus comprising: first and second respective receptacles, each having a longitudinal axis, the longitudinal axes being common with the cylindrical body being flanged;   a respective first and second plurality of flange rollers, rotatably seated in the first and second receptacles, respectively, about the common longitudinal axis, which roll along a respective end region surface of the cylindrical body, the flange rollers each having a cylindrical surface and a flange collar for forming a flange contour on the cylindrical body; and   at least two respective first and second limiting bodies, each respective limiting body being disposed between respective contiguous ones of the plurality of flange rollers, each respective limiting body extending inwardly toward the common longitudinal axis beyond the circumscribed cylindrical surface of the respective flange rollers at least when forming the flange;   whereby the respective limiting bodies prevent burrs or material from a respective end region of the cylindrical body from reaching or extending beyond the cylindrical surface of the respective flange rollers, and assure a uniform flange diameter at both respective ends of the cylindrical body.